Amazon Linux 2 Security Advisory: ALAS2-2025-3049
Advisory Released Date: 2025-10-27
Advisory Updated Date: 2025-10-27
Severity:
Important
Issue Overview:
YAML::Syck versions before 1.36 for Perl has missing null-terminators which causes out-of-bounds read and potential information disclosure
Missing null terminators in token.c leads to but-of-bounds read which allows adjacent variable to be read
The issue is seen with complex YAML files with a hash of all keys and empty values. There is no indication that the issue leads to accessing memory outside that allocated to the module. (CVE-2025-11683)
Affected Packages:
perl-YAML-Syck
Note:
This advisory is applicable to Amazon Linux 2 (AL2) Core repository. Visit this FAQ section for the difference between AL2 Core and AL2 Extras advisories.
Issue Correction:
Run yum update perl-YAML-Syck or yum update --advisory ALAS2-2025-3049 to update your system.
New Packages:
aarch64:
perl-YAML-Syck-1.27-3.amzn2.0.3.aarch64
perl-YAML-Syck-debuginfo-1.27-3.amzn2.0.3.aarch64
i686:
perl-YAML-Syck-1.27-3.amzn2.0.3.i686
perl-YAML-Syck-debuginfo-1.27-3.amzn2.0.3.i686
src:
perl-YAML-Syck-1.27-3.amzn2.0.3.src
x86_64:
perl-YAML-Syck-1.27-3.amzn2.0.3.x86_64
perl-YAML-Syck-debuginfo-1.27-3.amzn2.0.3.x86_64